From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E53DC31E4D for ; Fri, 14 Jun 2019 20:21:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D4E8321841 for ; Fri, 14 Jun 2019 20:21:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560543701; bh=7pm8JkCLHqEoLrJYY8z/2/wqC8f2TYEabiJDZrXwd5A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qXXt2/T0OgwhUOBBWdBViQOcJeVGM1Tc/Y+fX+aLyTICsC82t+ZAUcgthH5ZoY310 jzdkORl3sIGZ42JxBPGaNrhMn9y3AMWpotxxslKqhmH8UtZoM7iG0RlQjdgVrlZaLn miQ5ywEpIUHEiwCRQVVUY2Y2TAPriciNVfGLzrcM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726264AbfFNUVg (ORCPT ); Fri, 14 Jun 2019 16:21:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:43290 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726072AbfFNUVg (ORCPT ); Fri, 14 Jun 2019 16:21:36 -0400 Received: from sasha-vm.mshome.net (unknown [131.107.159.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 423F62184C; Fri, 14 Jun 2019 20:21:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560543695; bh=7pm8JkCLHqEoLrJYY8z/2/wqC8f2TYEabiJDZrXwd5A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=y6YMv1qU68gkZugK3Zs30fL635yTULIgOGn84MH449NBFuBJzExPGh9cigrJlIwQE RqIEblW+Qp8qPgGtfhPlQue/kbfpVY8HN5hvdJ7HK5A478nwceV1rCOPn7vzsY3Pue AqL86QycMpZGNo9FD0KrsnwoMHnUw19l6cSBtJtM= From: Sasha Levin To: peterhuewe@gmx.de, jarkko.sakkinen@linux.intel.com, jgg@ziepe.ca Cc: corbet@lwn.net, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-integrity@vger.kernel.org, linux-kernel@microsoft.com, thiruan@microsoft.com, bryankel@microsoft.com, tee-dev@lists.linaro.org, Sasha Levin Subject: [PATCH v5 2/2] fTPM: add documentation for ftpm driver Date: Fri, 14 Jun 2019 16:21:27 -0400 Message-Id: <20190614202127.26812-3-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190614202127.26812-1-sashal@kernel.org> References: <20190614202127.26812-1-sashal@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org This patch adds basic documentation to describe the new fTPM driver. Signed-off-by: Sasha Levin --- Documentation/security/tpm/index.rst | 1 + Documentation/security/tpm/tpm_ftpm_tee.rst | 31 +++++++++++++++++++++ 2 files changed, 32 insertions(+) create mode 100644 Documentation/security/tpm/tpm_ftpm_tee.rst diff --git a/Documentation/security/tpm/index.rst b/Documentation/security/tpm/index.rst index af77a7bbb070..15783668644f 100644 --- a/Documentation/security/tpm/index.rst +++ b/Documentation/security/tpm/index.rst @@ -4,4 +4,5 @@ Trusted Platform Module documentation .. toctree:: + tpm_ftpm_tee tpm_vtpm_proxy diff --git a/Documentation/security/tpm/tpm_ftpm_tee.rst b/Documentation/security/tpm/tpm_ftpm_tee.rst new file mode 100644 index 000000000000..29c2f8b5ed10 --- /dev/null +++ b/Documentation/security/tpm/tpm_ftpm_tee.rst @@ -0,0 +1,31 @@ +============================================= +Firmware TPM Driver +============================================= + +| Authors: +| Thirupathaiah Annapureddy +| Sasha Levin + +This document describes the firmware Trusted Platform Module (fTPM) +device driver. + +Introduction +============ + +This driver is a shim for a firmware implemented in ARM's TrustZone +environment. The driver allows programs to interact with the TPM in the same +way the would interact with a hardware TPM. + +Design +====== + +The driver acts as a thin layer that passes commands to and from a TPM +implemented in firmware. The driver itself doesn't contain much logic and is +used more like a dumb pipe between firmware and kernel/userspace. + +The firmware itself is based on the following paper: +https://www.microsoft.com/en-us/research/wp-content/uploads/2017/06/ftpm1.pdf + +When the driver is loaded it will expose ``/dev/tpmX`` character devices to +userspace which will enable userspace to communicate with the firmware tpm +through this device. -- 2.20.1